Further text read: "Get Mila Kunis' Esquire look with this intensive formula that helps reduce the appearance of cellulite fast... streamline your bum, thighs and tummy with this A-list must have."

One person challenged whether the ad exaggerated the results that were likely to be achieved from using the product.

Responding to the complaint, Rodial provided the Advertising Standards Authority (ASA) with information on two of the active ingredients in the product which it believed substantiated the efficacy claims.

The ASA said the ad implied that consumers who used the product would be able to reduce the appearance of cellulite and tighten and smooth their bottom, thighs and tummy.

But it concluded: "Because robust evidence was not presented to demonstrate the implied efficacy claims for the product or that Mila Kunis had achieved the look featured in the photo as a result of using the product, we concluded that the ad was misleading."

It ruled that the ad should not appear again in its current form, adding: "We told Rodial not to make efficacy claims without holding robust evidence."